<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="uname"/>
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model.number="age"/>
    </div>
    <div>
      <span>性别:</span>
      <select v-model="sex">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="addRevise">添加/修改</button>
    </div>
    <div>
      <table
        border="1"
        cellpadding="10"
        cellspacing="0"
      >
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item,index) in arr" :key="index">
          <td>{{index+1}}</td>
          <td>{{item.uname}}</td>
          <td>{{item.age}}</td>
          <td>{{item.sex}}</td>
          <td>
            <button @click="del(index)">删除</button>
            <button @click="edit(item,index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      flag:-1,
      uname:'',
      age:'',
      sex:'',
      arr:[
        {
          uname:'大娃',
          age:'6',
          sex:'男'
        },
        {
          uname:'二娃',
          age:'6',
          sex:'男'
        },
        {
          uname:'三娃',
          age:'6',
          sex:'男'
        },
        {
          uname:'四娃',
          age:'6',
          sex:'男'
        },
      ]
    }
  },
  methods:{
    addRevise() {
      if(this.flag>=0) {
        this.arr[this.flag].uname = this.uname 
      this.arr[this.flag].age = this.age 
      this.arr[this.flag].sex = this.sex 
      this.flag = -1
      } else {
        this.arr.push( {
          uname:this.uname,
          age:this.age,
          sex:this.sex,
        })
      }
    },
    del(index) {
      this.arr.splice(index,1)
    },
    edit(item,index){
     this.uname=item.uname,
      this.age=item.age,
      this.sex=item.sex,
      this.flag=index
      // console.log(this.flag);
    }
  }
}
</script>